Press for forming sheet-metal forms



Jan. 30, 1923.

J H. AUBLE ET AL, PRI-:ss FOR FoRMI No SHEET METAL FORMSy 4 SHEETS-SHEET F| Leo Ocr, I3. 1920.

a Z Z E INVENTUM Jan. 30, 1923. 1,443,408 J. H. AUBLE ET AL. PREss Fok Fonmms SHEET METAL FORMS.

FILED 001'. I3. 1920. 4 SHEETS-SHEET 3 13' /4 1 Y www /I la Z4 y .93 7 f ga 12 :t /az 4,4 i /3 Z0 I 1,30

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A TTORNEYS Jan. 30, 1923.

J. H AUBLE ET Al. l PRESS FOR FORMvNG SHEET METAL FORMS.

4 SHEUS- SHEET l1 A TTORN E YS Patented Jan. 30, 1923.

UNITED STATES PATENT OFFICE.

JAMES H. AUBLE AND JAMES L. AUBLE, OF CINCINNATI, OHIO, ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, OF TWO-NINTHS TO NATHAN HIRSCHBERG, 0F CIN- CINNATI, OHIO, .AND ONEPNINTH T0 ALBERT L. WEINSTEIN. OF CINCINNATI, OHIO.

PRESS FOR FORMING SHEET-METAL FORMS.

Application led October 13, 1920. Serial No. 416,717.

To all 'whom t may concern.'

Be it known that we7 Jamas H. AUBLE and JAMEs L. Amami, citizens ot the United States, and residents of the city oi' Cincinnati, in the county ot Hamilton and State of Ohio, have invented certain new and useful Improvements in Presses tor Forming Sheet-Metal Forms, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

Our invention relates to machines for lforming sheet metal blanks by dies and punches in which the articles may be formed by a series ot1 dies in one continuous operation instead of in a series oi separate independent operations.

In the attempts that have heretofore been made to treat sheet metal in one continuous operation, a series of dies have been provided, each set arranged to collapse aiter its work has been 'accomplished and in order to provide for such operation it has heretofore been found necessary to hold the parts under spring tension and diiculty has` been experienced in properly regulating the spring tension Jfor the shifting of the dies for successive operations. It is the object ot' our present invention to provide a construction in which the employment ot springs shall be ob'viated and the die sections shall be connected together positively and operated by screw threaded engagement with each other, whereby they may he positively actuated at the desired intervals with uniformity and accuracy.

'In the drawing1w Figure 1 is a central. longitudinal section of the two sets of dies partly broken away to show portions of the dies in elevation at the commencement of the operation.

Figure 2 is a similar view at the end ol the first operation.

Figure 3 is a similar view ai the end of the second operation.

Figure 4 is a similar view at the end ot' the third operation.

Figure 5 is a perspective view ot the Shaper head partly in section.

Figure 6 is a perspective view of the housing or casing for the upper set` of dies.

Figure T is a similar view for the lower housing.

Figure is a similar view of the ram head.

Figure i) is a perspective view of the tension bolts for holding and guiding the upper set ot' dies. Y

Figure l0 is a similar view of the plunger for removing the finished article.

Figure 11 is a perspective view of, the lower rotatable dies.

Figure l2 is a` similar view partly broken avfay oi' the outermost upper die.

Figures 13 and ist are similar views of the die shown in Figure 11 with different portions broken away.

Figures 15, 16 and 17 are perspective views of the parts making up one of the inner dies oi' the upper series.

Figures 18. 19 and 20 are similar views ot another oi these dies.

Figures 21, 22 and 23 are similar views ot' the parts making up the inner shaft about which the parts operate.

liigure is a perspective view. artly brullen away and on a somewhat en arged scale oi' one ot the dies of the upper series.

Figure 25 is a perspective view of one otl the collapsible rings.

.is illustrated we have shown a simple construction ['or forming a cylindrical shell although it will be understood that any desired shape oi dies may be employed. Also we have shown three sets ot forming dies while the-number ma)r be increased or di minished as desired. The male dies comprise an upper and a lower set which are iutcrlorrcd to slide and rotate with reference to cach other as the female die mounted on the ram of the press is advanced lgradually in one continuous operation to make the required drafts on the metal.

rlhe bolster plate 1 of the press has securely bolted thereto a lower housing or casing Q and an upper easing 3. Centrally mounted and held rigid in the bottom plate 6 of the housing by the nut 5 is an upright shaft 4i around which the male dies slide and rotate.

The ram head T carries the female die or Shaper 8 which is provided with the various shoulders 9 and 10 and the recess 1l tor formingv the blank into the desired shape in eonneetion with the male dies.

The Shaper 8 is suspended from the rant head by the tension bolts l2, l2. The bolts or rods extend through holes in the base ot' the ram head and are secured by nuts t3, i?) to a plate or bar l-l which is adapted to siide in a vertical slot l5 in the rain head. 'l`he lower ends ot' these rods l2 extend. down through holes i6. 16. in the housing or easing*r 3 which eneloses the upper set ot' the :nale dies and whieh easing is rig-idly mounted on the bolster l by the bolts tu. The lower ends oi the tension bolts l2 are provided with heads 2li. 2t). which are adapted to slide in vertieal grom'es 2l in the inner wall of the easingn and the heads also project in *ardly and engage under the upper end of the outermost nude die. which is also provided with vertical slots to permit the heads to slide therein.

Mounted in the central recess i1 in the shaper is a plunger plate 2:2 which is seeured to the bar Ll by the bolts :21% and nuts 24.

The housing 25 is provided with a horizontal slot Q5 through which the blank 26 to be drawn is passed for the aotion of the dies.

The outer edge Qi' of the Shaper in cooperation with the edge t28 of the easingY immediately below the slot forms a Cuttingr edge tor trimming` oti1 the blank as willl be deseribed.

Loeated within the (.-a.si1.|. i r 5i are a` .series of male dies Q9. B0 and 3l arranged to telescope within een-h other. but prevented trom rotat in gl with re l'erenee to eat-h other by keys and key-ways indicated at 32 and il". These dies :25)3 Ii() and Ill of this upper eet are supported ou and in serew threaded engagement with a lower set of supporting 1r die members B4 and 35. The upper die Q9 whieh with its upper surt'aee 36 presents a` support and elaniping surta': e tor the blank to be fornied is provided with exterior screw threads` at an angle ot' say 45 degrees which are in engagement with the die member 34. The other supporting die member is provided with eerew threads at a similar angle 'For both its outside and inside surtac'es and the die fl() if, serew threaded to engage the outer surface and the die 3l to engage the inner sur'laee ot the die support The serew threads tor the inner members are so arranged that the engagement does not take plaee however in the {irst instance but only after a partial rotation ot the respective dies. The upper mule dies beineV keyed together and to the tixed Control shaft -ido not rotate. but as oressure brought to bear by the shapelhead the outermost die 29 deerends whieh eauses the Y:lie support member to rotate sud with it the inner support 35. The male and ten'iale serews are so disposed that the inner Ieleseope dies iid and 3T will not descend but will rest on top oi the supporting? n'ieinber until the serew threads are brought into alinenient and thus in turn the inner dies will also desc-end.

The upper and aetive ends of the male dies Sti and i over whieh the blank is rolled and 'oided are eaeh provided with a flanged section 23T for thev die 2&0 (Figures 17 and 24) and 3H (Figure 20) YFor the die 31. These seotions are serew threaded into the bodies of their respective dies and around the upper end.Q underneath the Flange. we provide an expansion roil oih supporting: wire 3S? for die 30 and Al() for die lil. This Construction is illustrated in Figures l5. NJ and 1T tor one die and in Figures i8. '19 and Q() for the other.

The olijeet ol" this eonstruotion is to provide a eoniprossihle surfaee over which to roll the blank under treatment and thus prei'ent undue strain on the metal and to obtain a smooth unwrinltled surface tor the blank. eausingr a rolling' and preventing a drawing or stretrhing aetion and taking Care ot' the thirkening` or 'fattening ot the metal.

The various details ol the construction eau he more readily understood by a consideration oi' the inode oi' operation in the treatment of the blank YFrom its introduetion into the press.

ln Figure i the Dress is shown ready for the introduetiou ril' the metal and the initial strobe ot the ram head T Carrying the Shaper H, 'Phe metal to be blanlfed ie inserted in the rdot 25 and the head hroiurht down. rhe outside edge 2T and tlu` edgre in the inside ot the housing forro eutting edges to eut the blank to the size or shane desired and the metal during the cuttingd is elainped he tween the outsidi` portion ot the Shaper and the upper surtaee of the die 29. .is hereto tore deerril'led the lower end of the die 29 is in .serew threaded engagement with the stur porting` member S4 and the down'fird pressure ot the diaper eauses this member M to rotate. The members 3l aud Tlf are united together br the base i0 and the meu'dier rotates with the member 34. 'The upper member fyi. therefore. doseends and the hlaulr u rolled ind Vformed over the die 30 into the position shown in Figure Q. During this movement thix dies are held in perfeet threaded eontaet. the inner dies being` in ront-awt on the upper end of member 34 in the otiilets of' the thread. The heads 20 on the lower ends ot the tension rods 'l2 deseend in the blote t?! in the. housing: Il and the slots il (Figure [2l in the die 29, BV the time the iii-st 'torni is rolled the supl'iortini.: member Iii has rotated suiiieiently to allow the temule thread 4:2 on the inner surtaee of the die Co to operate with the male thread W on the outer sort-.lee oiE member 35. The die ii() will. therefore. begin to deseend and by reason ot the threads will be pulled down and onljv at the rate permitted by the screw lll) threads and the dies will assume the position shown in Figure 3 and the second form will be given the blank.

The ram still descending.y the member 35 will be rotated sufiiciently to allow the male thread 44 on the outer surface ot' die 3l to operate with the female thread 45 ou the inner surface of the member IE5 and the die 3l will begin to descend. The upper end of the Shaft 4 then becomes the male die. This shaft is provided with the head V3 having a stem 47 seated in a central opening in the shaft. ln addition to utilizing this innermost male die as merely a forming die, we can also make provision in the final operation for pressing screw threads on the inner surface of the linished blank. To accomplish this we form a cone 48 on the upper end ot' the shaft 4 and mount on this cone an expansion cutting tap formed of a spiral coil 50 to be seated on the core. The flange or projecting portion of the head 46 bears upon this expansion tap and this pressure slides the tap towards the base ot the cone thus pressing the screw threads in the finished blank.

At the completion of the stroke of the head the dies will be in the position shown in lP igure 4. During the linal movement the plunger Q2 has been pushed upward into the base ot the inner socket in the shaper and this has carried the bar la into this upper end ot' the slot in the ram head as shown in Figure 4. This movement of the bar 14 also retracts the tension rods 1:2` and at the completion ot the down stroke the lugs Q0 have been drawn upwardly ready to engage the die 29 at the upper end ol the slot 4l.

The blank has now been completelyT formed in one Continuous operation and the return stroke of the ram in the first place pulls the bar i4 back to its position as shown in VFigurer-.2 1. 2 and The effect ot this is to causes the plunger to push the finished blank from the forming die so that it can be removed. The draft on the outermost die 29 by the heads in the tension rods then causes the supporting members to rotate in the opposite direction and by reverse movement the various dies are brought back to their original normal position ready for the next operation.

lt will be noted that in forming the blank with our construction in which the dies are held positively during the successive operations and after a die has served its purpose and is caused to telescope to bring into action the next succeeding die. that the movement is positive and that by the screw threaded engagement the die is gradually withdrawn in exact proportion to the advance ot' the ram head so that pressure is always maintained on the blank throughout the series of operations. Instead of the dies when ready to be released being held by spring pressure and allowed to collapse. the die is positively withdrawn and at the saut rate as the Shaper advances. rhis is a point of great importance in our present construction iior the reason that in this way the metal blank may be rolled. as it were` into the form desired and the liability of the metal to wrinkle is reduced to a minimum. Where a wrinkle forms. the strength ol the metal is increased so that it is extremely diilicult in a successively operating machine to smooth out the lwrinkles. lVhereas with our construction. the pressure never being released, the metal can be roiled into shape without the formation of wrinkles.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent, is

l. In an apparatus ot the character specified a forming die comprising a` non-rotatable slidable member and a rotatable actuating member adapted to make screw threaded engagement with the slidable member and means tor rotating the rotatable member to bring said screw threaded portions into engagement to positively withdraw the forming die.

2. ln an apparatus ot' the character specitied a Forming die comprising a non-rotatable slidable member and a rotatable actuating member adapted to make screw threaded engagement with the slidable member. a supporting member Jfor the blank to rotate the rotatable member to bring said screw threaded portions into engagement to positively withdraw the forming die.

3. ln an apparatus of the character specified. telescoping dies comprising outer and inner members adapted to slide but not to rotate with reference to each other with a cooperating rotatable supporting member with which the dies make successive screw threaded engagement to permit the telescoping of said dies in succession. Y

4. ln an apparatus ot' the character specified, telescoping dies. couiprising outer and inner members adapted to slide but not to rotate with reference to each other with a cooperating rotatable supporting member with which the dies make successive screw threaded engagement to permit the telescoping ot said dies in succession.y and means lor rotating the rotatable member to bring said screw threaded portions into engagement.

5. in an apparatus oF the character specified. telescoping dies. comprising outer and inneiI members adapted to slide but not to rotate with reference to each other with a cooperating rotatable supporting member with which the dies make successive screw threaded engagement to permit the telescopine ot said dies in succession. and a blank supporting member for rotating the rotatable member to bring said screw threaded lill) lltl portions into engagement to positively withdraw the forming dies.

6. In an apparatus of the Character specified telescoping (Hes comprising outer and inner members adapted tn Slide but not to 'ntnv wth rcfoxmfa i0 enc-h other, :1. C0- operating rotatahe Supporting member with which the die@ make sumessiv@ screw threadvd engagement and an inne? forming die with a con@ shaped support therefoi' and an vxparwinu ruttng tap intermediate the (He anr suppm't whereby a blank may be formed um? 'internally threaded in (me continuous 1pm-ation.

JAMES H. AUBLE. JAMES L. AUBLE. 

